Rust + redis , example-2

Cargo.toml

[package]
name = "redis_test"
version = "0.1.0"
edition = "2021"
publish = false

[dependencies]
redis = "0.32"

main.rs

use redis::{Commands, Connection, RedisResult};
use std::{thread, time};

fn main() -> RedisResult<()> {
    // 今の時刻を取得
    let now = time::Instant::now();
    // Redis に接続
    let client = redis::Client::open("redis://127.0.0.1/")?;
    let mut con = client.get_connection()?;

    let mut position = 1;
    let mut target = "";
    for i in 0..1000 {
      let mut temp = format!("k:{}", position.to_string());
      target = &temp;
      let _: () = con.set(target, "Hello, Redis!")?;
      //println!("Key saved={}", target);
      position += 1;
    }
    println!("{:?}", now.elapsed());

    Ok(())
}